secstotimestr: use int32_t not to overflow if int exceeds 32-bits

include/vlc_mtime.h

@@ -58,7 +58,7 @@ VLC_EXPORT( char *,  mstrtime, ( char *psz_buffer, mtime_t date ) );
 VLC_EXPORT( mtime_t, mdate,    ( void ) );
 VLC_EXPORT( void,    mwait,    ( mtime_t date ) );
 VLC_EXPORT( void,    msleep,   ( mtime_t delay ) );
-VLC_EXPORT( char *,  secstotimestr, ( char *psz_buffer, int secs ) );
+VLC_EXPORT( char *,  secstotimestr, ( char *psz_buffer, int32_t secs ) );
 
 # define VLC_HARD_MIN_SLEEP 10000   /* 10 milliseconds = 1 tick at 100Hz */
 

src/misc/mtime.c

@@ -125,7 +125,7 @@ char *mstrtime( char *psz_buffer, mtime_t date )
  * \param psz_buffer should be a buffer at least MSTRTIME_MAX_SIZE characters
  * \return psz_buffer is returned so this can be used as printf parameter.
  */
-char *secstotimestr( char *psz_buffer, int i_seconds )
+char *secstotimestr( char *psz_buffer, int32_t i_seconds )
 {
     div_t d;